Liquid crystal display module and driving apparatus thereof

• US 20040264212A1
• Filed: 06/14/2004
• Published: 12/30/2004
• Est. Priority Date: 06/30/2003
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Philips LCD Company Limited (LG Display Co., Ltd.)
• Inventors: Chae, Gee Sung, Chung, In Jae
• Granted Patent: US 8,289,472 B2
• Time in Patent Office: Days
• US Class Current: 362/561
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133604 with lamps
• CPC Class Codes: G02F 1/133609 including means for improving the color mixing, e.g. white
• CPC Class Codes: G09G 2310/024 Scrolling of light from the illumination source over the display in combination with the scanning of the display screen
• CPC Class Codes: G09G 2360/16 Calculation or use of calculated indices related to luminance levels in display data
• CPC Class Codes: G09G 3/3413 Details of control of colour illumination sources
• CPC Class Codes: G09G 3/342 using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines

Abstract

A liquid crystal display module includes a liquid crystal display panel, a plurality of lamps for irradiating a first light onto the liquid crystal display panel, and a back light unit including a plurality of light emitting diode arrays, each of the light emitting diode arrays having a plurality of light emitting diodes arranged between the lamps to irradiate a second light onto the liquid crystal display panel.

Claims

1. A liquid crystal display module, comprising:

a liquid crystal display panel;

a plurality of lamps for irradiating a first light onto the liquid crystal display panel; and

a back light unit including a plurality of light emitting diode arrays, each of the light emitting diode arrays having a plurality of light emitting diodes arranged between the lamps to irradiate a second light onto the liquid crystal display panel.

2. The liquid crystal display module according to claim 1, wherein the liquid crystal display panel includes a color filter layer, the liquid crystal display panel converts that the first light generated from the back light unit into a plurality of colored lights.

3. The liquid crystal display module according to claim 2, wherein the color filter layer has colored pixel regions of red, green, and blue.

4. The liquid crystal display module according to claim 3, wherein each of the colored lights has a wavelength width of less than about 30 nm.

5. The liquid crystal display module according to claim 1, wherein each of the light emitting diode arrays include a circuit for controlling each of the light emitting diodes.

6. The liquid crystal display module according to claim 5, wherein each of the light emitting diodes is a white light emitting diode.

7. The liquid crystal display module according to claim 5, wherein the light emitting diodes include a first number of yellow light emitting diodes and a second number of cyan light emitting diodes.

8. The liquid crystal display module according to claim 7, wherein each of the yellow light emitting diodes and each of the cyan light emitting diodes are alternately arranged with each other along a lengthwise direction of the plurality of lamps.

9. The liquid crystal display module according to claim 5, wherein the light emitting diodes include a first number of yellow light emitting diodes and a second number of magenta light emitting diodes.

10. The liquid crystal display module according to claim 9, wherein each of the yellow light emitting diodes and each of the magenta light emitting diodes are alternately arranged with each other.

11. The liquid crystal display module according to claim 5, wherein the light emitting diodes include a first number of yellow light emitting diodes, a second number of cyan light emitting diodes, and a third number of magenta light emitting diodes.

12. The liquid crystal display module according to claim 11, wherein each of the yellow light emitting diodes, each of the cyan light emitting diodes, and each of the magenta light emitting diodes are alternately arranged with each other.

13. The liquid crystal display module according to claim 5, wherein the light emitting diodes include a first number of yellow light emitting diodes, a second number of cyan light emitting diodes, a third number of magenta light emitting diodes, and a fourth number of white light emitting diodes.

14. The liquid crystal display module according to claim 13, wherein each of the yellow light emitting diodes, each of the cyan light emitting diodes, each of the magenta light emitting diodes, and each of the white light emitting diodes are alternately arranged with each other.

15. An apparatus of driving a liquid crystal display module, comprising:

a liquid crystal display panel;

a plurality of lamps for irradiating a first light onto the liquid crystal display panel;

a back light unit including a plurality of light emitting diode arrays, each light emitting diode array having a plurality of light emitting diodes arranged between the lamps for irradiating a second light onto the liquid crystal display panel;

a lamp driving system for driving the lamps;

a light emitting diode driving system for driving the light emitting diodes;

a frame memory for storing image data; and

a controller having a pattern analyzer for detecting the image data provided from the frame memory and a control signal generator for generating a control signal to control the lamp driver and the light emitting diode driving system in accordance with a result analyzed by the pattern analyzer.

16. The apparatus according to claim 15, wherein the pattern analyzer analyzes the image data for each frame unit stored in the frame memory to detect information including brightness and color purity for the image data and generates a detection signal corresponding to the information.

17. The apparatus according to claim 16, wherein the control signal generator supplies a driving signal to the light emitting diode driver to drive the emitting diodes in response to the detection signal from the pattern analyzer.

18. The apparatus according to claim 15, wherein the liquid crystal display panel includes a color filter layer for converting the second light generated from the back light unit into a plurality of colored lights.

19. The apparatus according to claim 18, wherein the color filter layer has color pixel regions of red, green, and blue.

20. The apparatus according to claim 19, wherein each of the plurality of colored lights has a wavelength width of less than about 30 nm.

21. The apparatus according to claim 15, wherein each of the light emitting diode arrays includes a circuit for controlling the light emitting diodes.

22. The apparatus according to claim 21, wherein the light emitting diodes include a plurality of white light emitting diodes.

23. The apparatus according to claim 21, wherein the light emitting diodes include a first number of yellow light emitting diodes and a second number of cyan light emitting diodes.

24. The apparatus according to claim 23, wherein each of the yellow light emitting diodes and each of the cyan light emitting diodes are alternately arranged with each other.

25. The apparatus according to claim 21, wherein the light emitting diodes include a first number of yellow light emitting diodes and a second number of magenta light emitting diodes.

26. The apparatus according to claim 25, wherein each of the yellow light emitting diodes and each of the magenta light emitting diodes are alternately arranged with each other.

27. The apparatus according to claim 21, wherein the light emitting diodes include a first number of yellow light emitting diodes, a second number of cyan light emitting diodes, and a third number of magenta light emitting diodes.

28. The apparatus according to claim 27, wherein each of the yellow light emitting diodes, each of the cyan light emitting diodes, and each of the magenta light emitting diodes are alternately arranged with each other.

29. The apparatus according to claim 21, wherein the light emitting diodes include a first number of yellow light emitting diodes, a second number of cyan light emitting diodes, a third number of magenta light emitting diodes, and a fourth number of white light emitting diodes.

30. The apparatus according to claim 29, wherein each of the yellow light emitting diodes, each of the cyan light emitting diodes, each of the magenta light emitting diodes, and each of the white light emitting diodes are alternately arranged with each other.